I declared a variable x that gets the count(*) from a table. The table name is also defined as a variable.
What's wrong with this statment :
X=” select count(*) from ${table_name}“
then
y = `${X}${table_name}'
echo ${y}
It throws an error saying count not found.
Please... (1 Reply)
I am just stucked in syntax.This is more like a array and for loop problem.
I want to use ls -l command and get filezise and filename of all filenames in the directory in an array (say array#1).
After 2 minutes of sleep, i want to get the same information in another array (say array#2).
The... (4 Replies)
Dear all,
i m unable to give array decalartion in solaris Operating system shell script
and script was so.sh
declare -a bull
for i in 1 2 3 4 5 6 7 8 9
do
bull=$i
echo "${bull}"
done
it is throwing an error called
so.sh: declare: not found
so.sh: bull=1: not... (20 Replies)
Hello,
I have a problem with the declaration of a function.
This is how I declare the function :
c:63: void foo(threadpool *tp,void (*func)(void*), (void*)arg);
Inside main, I call it like this:
main(){
..........
threadpool y;
c:104: ... (4 Replies)
this is my code
declare -a USERCERT
declare -a CACERT
declare -a KEYSRC
this is the error
+ declare -a USERCERT
./clone.sh: 1: declare: not found
+ declare -a CACERT
./clone.sh: 1: declare: not found
+ declare -a KEYSRC
./clone.sh: 1: declare: not found (11 Replies)
Hi,
Have assigned values in Array and iterating in while loop and would require values outside of the loop. But its returning NULL.
could you please help us how to define Global array declaration in Unix shell scripting?
i am using Kron shell.
Thanks in advance. (2 Replies)
SYSTEM(3) Linux Programmer's Manual SYSTEM(3)NAME
system - execute a shell command
SYNOPSIS
#include <stdlib.h>
int system(const char *string);
DESCRIPTION
system() executes a command specified in string by calling /bin/sh -c string, and returns after the command has been completed. During
execution of the command, SIGCHLD will be blocked, and SIGINT and SIGQUIT will be ignored.
RETURN VALUE
The value returned is -1 on error (e.g. fork failed), and the return status of the command otherwise. This latter return status is in the
format specified in wait(2). Thus, the exit code of the command will be WEXITSTATUS(status). In case /bin/sh could not be executed, the
exit status will be that of a command that does exit(127).
If the value of string is NULL, system() returns nonzero if the shell is available, and zero if not.
system() does not affect the wait status of any other children.
CONFORMING TO
ANSI C, POSIX.2, BSD 4.3
NOTES
As mentioned, system() ignores SIGINT and SIGQUIT. This may make programs that call it from a loop uninterruptable, unless they take care
themselves to check the exit status of the child. E.g.
while(something) {
int ret = system("foo");
if (WIFSIGNALED(ret) &&
(WTERMSIG(ret) == SIGINT || WTERMSIG(ret) == SIGQUIT))
break;
}
Do not use system() from a program with suid or sgid privileges, because strange values for some environment variables might be used to
subvert system integrity. Use the exec(3) family of functions instead, but not execlp(3) or execvp(3). system() will not, in fact, work
properly from programs with suid or sgid privileges on systems on which /bin/sh is bash version 2, since bash 2 drops privileges on
startup. (Debian uses a modified bash which does not do this when invoked as sh.)
The check for the availability of /bin/sh is not actually performed; it is always assumed to be available. ISO C specifies the check, but
POSIX.2 specifies that the return shall always be non-zero, since a system without the shell is not conforming, and it is this that is
implemented.
It is possible for the shell command to return 127, so that code is not a sure indication that the execve() call failed.
SEE ALSO sh(1), signal(2), wait(2), exec(3)
2001-09-23 SYSTEM(3)